- Achieve the effects of a High Altitude Workout Efficiency when training, which helps decrease & maximizes your workout time
- 4-Level Resistance Valve System Trains Breathing Muscles and Improves Overall Performance in any Sport
- Increase & Conditions Lung Capacity by Creating Pulmonary Resistance
- Simple Usage, Ultra-Lightweight, Anatomically Designed, Non-Slip Training Strap
- Strengthens the Diaphragm
- One Size Fits Most - From 120 to 230 LBS
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